Spool.



M. LEITGH.

SPOOL. APPLIOATION FILED DBO. 5, 190a.

Patented Nov. 22, 1910.

2 SHEETS-SHEET l.

llll ll lllllll II'I M. LEITGH.

SPOOL.

APPLICATION FILED DEC. 6, 1908.

Patented Nov. 22, 1910.

2 BEEBTS-SHBET 2.

WWW

erases.

ira arena am MEREDITH LEITCH, 0F SPRINGFIELD, MASSACHUSETTS, .ASSIGNORTO THE AMERICAN THREAD COMPANY, A CORPORATION OF NEW JERSEY.

SPOOL.

To all whom it may concern:

Be it known that I, MEREDITH LEITCH, a citizen of the United States,residing at Springfield, county of Hampden, State of Massachusetts, haveinvented certain new and. useful Improvements in Spools, of which thefollowing is a full, clear, and exact description.

My invention relates to spools, and has for its object to providesurfaces for securing the rotation of the spools about their true axesin winding, to permit the use of a lighter stock in the making ofmetallic spools and to provide for covering or recovering the metallicbases of the spools.

Ihave shown and described a sheet metal spool in my application, SerialNo. 460,431,

filed October 31, 1908, and have set out in that application variousvaluable features possessed by the construction therein disclosed.

By my present invention the body of the spool described in my priorapplication even when made of light metal can be made to stand thecrushing strain to which it is subjected in winding, which strain, whenthe spool is full of thread, is very great; and when the heads of thespool are made of light metal, spindles can be used such that there will.be no longitudinal movement due to the yielding of the thin metalheads, such as would be the case where ordinary spindles are used.Moreover, spindles can be used whereby the danger of having the spindlesream or tear the holes so that there is no longer a fixed e agementbetween the spool and spindle is ehminated, and there is no danger ofhaving the hole become, larger than the spindle so'that the spool is notproperly centered thereon. Moreover, the trouble, when the center of thehole is not in line with the axis of the spool body, which with theordinary spindle, even if the hole did not tear out, would make the axisof the spool out of line with the axis of the spindle, can beeliminated.

Another advantage of my present invention is that it permits themetallic bases of the spool to be easily covered and recovered. The useof lighter metal reduces the cost of manufacture, and the accuratecentering on the spindle makes the winding more accurate, while the easein covering makes the spool more easy to manufacture and permits therepeated use of the metallic base.

Specification of Letters Patent. Patented Nov. %2, 119mm. Applicationfiled December 5, 1908. Serial No. 466,056.

side elevation of the reinforcing lining. for

the body of the spool. Fig. 4 is an end elevation of said lining. Fig.5'is an enlarged sectional view of a detail showing the method offastening the paper cover. to themetallic base, and Figs. 6 and 7 areenlarged sectional details of modifications of the construction shown inFig. 5.

Referring more particularly to the drawings, A is the metalliccylindrical portion of the spool, the same being formed from a sheet ofmetal whose edges are secured to gether by a longitudinal seam B. Thisme tallic portion is secured to tapering metallic head portions 0 byjoints D formed at each end. At the joint D, I reduce the end of theportion A as at E and by these reduced portions I hold a'lining F,preferably corrugated circumferentially, as shown, and hearing againstthe cylindrical body A so as to reinforce the same against any lateralstrain due to the thread which may be wound thereon. This reinforcingcylinder F is preferably formed from a sheet of metal whose ends aresecured together by a longitudinal seam G, which in the spool isdisplaced relatively to the seam B of the body portion.

In order that the seam B may be formed on the inside of the body portionA, the

reinforcing lining is provided with a groove or indentation H whichpasses over the seam B when the corrugated reinforcing lining isinserted in the body portion A. With this arrangement the lining is heldrigidly against lon itudinal movement and renders the body of the spoolsufiiciently strong to withstand great ressure even though lightmaterials are used for both body and lining.

To the tapering portions C end ieces I are secured by joints J. Thesejomtsare formed by the well known seaming machines used in themanufacture of tin cans and the like, and inasmuch as in the process ofmanufacture, the bod-y'portion A is cylmdr cal and the portions C areconcentric therewith, the seams J have both their internal and theirexternal surfaces accurately concentric.

with the axis of the body portion A. I take advantage of this accuratelyconcentric relation for securing the revolution of the spool about itstrue axis by providing driving s indles K having extended driving headsconcentric with the axes of the spindles and of such a size as toaccurately enspindles with the spool near the peripheries interfereswith of the heads furnishes a large driving surface such that frictionalengagement alone is sufiicient under many condit1ons to drive the spool.If desired, prickers M may be used, which will penetrate the metal ofthe ends and provide a still stronger driving engagement between thespindles and the spools. The spindles may also be provided withprojections N for entering the holes 0 in the spool ends, if such holesare provided. The projections, however, should 'be smaller than theholes, since,v as above described, there is a liability that the holeswill not be properly centered.

In addition to securing an accurate driving surface always concentricwith the axis of the spool, the engagement of the spindle head with thespool at 1ts periphery prevents any longitudinal movement of the s 001in winding. On account of the flexibility of a thin head, the spool,when supported by engagement at or near the center only, is liable tohave a limited longitudinal vibration or movement while being wound,which the true lay of the thread. When, however, the support is near thee riphery, as shown in Fig. 1, the supporting engagement is with theparts which are substantlally rigid and have no longitudinal movement,and therefore, the difficulty referred to is eliminated.

In order to permit the sheet metal bases to be covered with fibrousmaterial such as paper or similar material after the bases are formed, Iprovide the heads with cylindrical portions P adjacent to the seam J andsecure the paper covering Q to the ends so that it laps over on to thesecylindrical portions P. I then apply a small strip or tape R of paper orthe hke rovided with a suitable adhesive so that it adheres to the edgeof the paper cover, which lies upon the cylindrical portions, in thisway securing it in position and preventing the paper from expanding soas to show a raw or rough ed e. The strip provides a finish to the edge0 the paperas well as restraining it in position.

This is shown in enlarged cross-section in Fig. 5. Fig. 6 shows asomewhat similar construction except that the head has a recess formedbeneath it under which the edge of paper covering can extend. The edgecan be forced within the recess and will be kept from rising by theoverhang. If de-' sired a restraining strip may be applied in the samemanner as in Fig. 5, although such strip is not always necessary.

Fig. -7 shows a spool in which the paper originally extended beneath theseam so as to be clamped down' and held thereby. Upon becoming soiled itis cut by a sharp instrument along the right hand ed e of the seam,leaving a ortion- S secure 'therein. A new covering is then applied tothe tapered portion of the spool extending on to the cylindricalportion, and a securing tape R applied to the edge thereof. In each casea cylindrical portion P is formed adjacent to the seam J and thecovering is extended over the cylindrical portion P and secured theretoby a securing tape. The covering Q is formed from a sheet cut in theproper shape, the ends being lapped as at T.

The body of the spool is covered by a strip of aper U secured theretowith a lapped joint V and the end portions Q are extended so as to beover the covering of the body portion.

What I claim is:

1. A spool having a-metallic body portion with enlarged heads securedthereto, said body portion having a circumferentially corrugatedreinforcing lining, the body ortion bemg formed with a longitudinalocking seam.

2. A spool having a metallic body portion with enlarged heads securedthereto, said body portion having a circumferentially corrugatedreinforcing'lining, said body portion being formed with a longitudinallocking seam, and said lining having a longitudinal seam displacedrelatively t5 the seam in said body portion.

3. In a spool, the combination of a metallic base consisting of acylindrical portion and tapered enlarged heads secured thereto, fibrouscoverings for the tapered surfaces of the enlarged heads and an adheringbinding strip securing the edges of the coverings on said taperedortions at the peripheries of said heads, sai heads having lateralprojections extending beyond said strips and adjacent thereto.

4. In a spool, the combination of a base having a cylindrical metallicbody ortion and tapered end portions rovide with heads at theirperipheries an substantially cylindrical parallel portions adjacent tosaid heads with fibrous coverings for said end portions, and an-adheringbinding strip securing the edges of the paper coverin vsaid end portionsatthe parallel cylindrica portions of said end portions, said headshaving lateral projections extending beyond said V strips and adjacentthereto,

5. In a spool, the combinationof a spool body having a cylindricalportion and coneshaped heads, said cone-shaped heads havingcircumferential recesses in their peripheries extending in a directionparallel to the axis of the spool, the recesses in one head openingtoward the recesses in the other head, and a fibrous covering for saidheads extending into said recesses, the recesses being such that theedges of the fibrous covering can be forced Within them.

6. In a spool, the combination of a spool body having a cylindricalportion and coneshaped heads, said cone-shaped heads havingcircumferential recesses near their-peripheries extending in a directionparallel to the axis of the spool, the recesses in one head openingtoward the recesses in the other head, a fibrous covering for said headsextending into said recesses, the recesses being such that the edges ofthe fibrous covering can be forced Within them, and adhering stripsapplied to said covering in proximity to said recesses.

7. In a spool, the combination of a cylindrical metallic body portionhaving parts near its end reduced in diameter, a lining therefor heldWithin said body portion by the reduced parts, and end portions securedto said body portion by seams formed at said reduced parts.

MEREDITH LEITCH. Witnesses:

FREDERICK K. FEARNSIDE, JOHN J. DONELAN.

